May is a prostitute with both a sick mother and son to look after. After being raped and accidentally killed by a group of construction workers, her ghostly self takes over the phone lines to execute revenge.

Anita Lee Yuen-Wah
as May Chan

Sean Lau Ching-Wan
as Officer Ma Fai

William Ho
as Linesman Chan Ping

James Ha Chim-Si
as Leung

Onitsuka Ng Kin-Chung
as Kwai

Peter Chan Lung
as Biu

Gwennie Tam
as Kitty

Helena Law Lan
as May's mom

Ivy Leung Si-Man
as Kwai's wife

Hui Pui
as Kwai's mistress